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Aug
Oct
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Jun
Aug
Oct
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Feb
Apr
2015
2016
$35.23, Jun 16 - Jun 28 $22.73, Jun 16 - Jun 19 $19.95, Jun 16 - Jun 29 $35.23, Jun 16 - Jun 28 $22.99, Jun 19 - Jul 8 $19.95, Jun 16 - Jun 29 $35.72, Jun 29 - Jul 8 $22.99, Jun 19 - Jul 8 $19.95, Jun 16 - Jun 29 $35.72, Jun 29 - Jul 8 $22.99, Jun 19 - Jul 8 $19.77, Jun 30 10:08 pm $35.72, Jun 29 - Jul 8 $22.99, Jun 19 - Jul 8 $19.35, Jul 2 3:04 am $35.72, Jun 29 - Jul 8 $22.99, Jun 19 - Jul 8 $17.85, Jul 4 11:44 am $35.72, Jun 29 - Jul 8 $22.99, Jun 19 - Jul 8 $17.49, Jul 5 3:40 pm $35.72, Jun 29 - Jul 8 $22.99, Jun 19 - Jul 8 $16.83, Jul 8 5:34 am $35.96, Jul 9 - Nov 25 $24.42, Jul 9 - Jul 14 $15.83, Jul 9 10:29 am $35.96, Jul 9 - Nov 25 $24.42, Jul 9 - Jul 14 $14.61, Jul 10 4:59 pm $35.96, Jul 9 - Nov 25 $24.42, Jul 9 - Jul 14 $13.59, Jul 13 3:57 am $35.96, Jul 9 - Nov 25 $24.42, Jul 9 - Jul 14 $12.24, Jul 14 1:44 pm $35.96, Jul 9 - Nov 25 $27.37, Jul 15 10:47 pm $7.65, Jul 15 - Jul 21 $35.96, Jul 9 - Nov 25 $24.42, Jul 17 - Jul 30 $7.65, Jul 15 - Jul 21 $35.96, Jul 9 - Nov 25 $24.42, Jul 17 - Jul 30 $19.95, Jul 23 - Jul 26 $35.96, Jul 9 - Nov 25 $24.42, Jul 17 - Jul 30 $22.00, Jul 27 - Dec 17 $35.96, Jul 9 - Nov 25 $27.34, Aug 1 5:01 am $22.00, Jul 27 - Dec 17 $35.96, Jul 9 - Nov 25 $27.36, Aug 2 11:46 pm $22.00, Jul 27 - Dec 17 $35.96, Jul 9 - Nov 25 $27.31, Aug 3 9:48 pm $22.00, Jul 27 - Dec 17 $35.96, Jul 9 - Nov 25 $27.24, Aug 4 - Aug 6 $22.00, Jul 27 - Dec 17 $35.96, Jul 9 - Nov 25 $27.22, Aug 7 10:11 pm $22.00, Jul 27 - Dec 17 $35.96, Jul 9 - Nov 25 $27.13, Aug 9 12:40 am $22.00, Jul 27 - Dec 17 $35.96, Jul 9 - Nov 25 $27.00, Aug 11 4:21 am $22.00, Jul 27 - Dec 17 $35.96, Jul 9 - Nov 25 $26.98, Aug 13 2:21 am $22.00, Jul 27 - Dec 17 $35.96, Jul 9 - Nov 25 $26.96, Aug 14 - Aug 21 $22.00, Jul 27 - Dec 17 $35.96, Jul 9 - Nov 25 $26.92, Aug 23 12:15 am $22.00, Jul 27 - Dec 17 $35.96, Jul 9 - Nov 25 $26.88, Aug 23 - Aug 25 $22.00, Jul 27 - Dec 17 $35.96, Jul 9 - Nov 25 $26.84, Aug 26 1:45 am $22.00, Jul 27 - Dec 17 $35.96, Jul 9 - Nov 25 $26.82, Aug 27 - Aug 30 $22.00, Jul 27 - Dec 17 $35.96, Jul 9 - Nov 25 $26.78, Aug 31 4:19 pm $22.00, Jul 27 - Dec 17 $35.96, Jul 9 - Nov 25 $26.76, Sep 1 8:04 pm $22.00, Jul 27 - Dec 17 $35.96, Jul 9 - Nov 25 $27.26, Sep 4 - Sep 8 $22.00, Jul 27 - Dec 17 $35.96, Jul 9 - Nov 25 $27.24, Sep 10 - Sep 15 $22.00, Jul 27 - Dec 17 $35.96, Jul 9 - Nov 25 $27.16, Sep 17 10:01 pm $22.00, Jul 27 - Dec 17 $35.96, Jul 9 - Nov 25 $27.14, Sep 20 - Sep 30 $22.00, Jul 27 - Dec 17 $35.96, Jul 9 - Nov 25 $27.12, Oct 2 - Oct 7 $22.00, Jul 27 - Dec 17 $35.96, Jul 9 - Nov 25 $27.10, Oct 9 4:05 am $22.00, Jul 27 - Dec 17 $35.96, Jul 9 - Nov 25 $27.08, Oct 11 5:46 am $22.00, Jul 27 - Dec 17 $35.96, Jul 9 - Nov 25 $26.90, Oct 13 8:28 am $22.00, Jul 27 - Dec 17 $35.96, Jul 9 - Nov 25 $26.86, Oct 15 - Oct 24 $22.00, Jul 27 - Dec 17 $35.96, Jul 9 - Nov 25 $26.87, Oct 30 5:30 am $22.00, Jul 27 - Dec 17 $35.96, Jul 9 - Nov 25 $26.72, Nov 4 6:52 pm $22.00, Jul 27 - Dec 17 $35.96, Jul 9 - Nov 25 $26.23, Nov 11 7:23 am $22.00, Jul 27 - Dec 17 $35.96, Jul 9 - Nov 25 $25.86, Nov 16 7:23 am $22.00, Jul 27 - Dec 17 $35.96, Jul 9 - Nov 25 $25.58, Nov 19 9:25 am $22.00, Jul 27 - Dec 17 $35.96, Jul 9 - Nov 25 $25.47, Nov 21 11:07 am $22.00, Jul 27 - Dec 17 $35.96, Jul 9 - Nov 25 $25.32, Nov 23 11:13 am $22.00, Jul 27 - Dec 17 $35.96, Jul 9 - Nov 25 $25.16, Nov 25 3:28 pm $22.00, Jul 27 - Dec 17 $35.59, Nov 27 - Dec 13 $25.11, Nov 27 12:08 pm $22.00, Jul 27 - Dec 17 $35.59, Nov 27 - Dec 13 $25.03, Nov 29 10:29 am $22.00, Jul 27 - Dec 17 $35.59, Nov 27 - Dec 13 $24.90, Dec 1 9:27 am $22.00, Jul 27 - Dec 17 $35.59, Nov 27 - Dec 13 $24.76, Dec 3 7:59 am $22.00, Jul 27 - Dec 17 $35.59, Nov 27 - Dec 13 $24.61, Dec 5 5:47 am $22.00, Jul 27 - Dec 17 $35.59, Nov 27 - Dec 13 $24.56, Dec 7 3:23 am $22.00, Jul 27 - Dec 17 $35.59, Nov 27 - Dec 13 $24.51, Dec 9 4:43 am $22.00, Jul 27 - Dec 17 $35.59, Nov 27 - Dec 13 $24.42, Dec 11 7:41 am $22.00, Jul 27 - Dec 17 $35.59, Nov 27 - Dec 13 $24.31, Dec 13 7:10 am $22.00, Jul 27 - Dec 17 $35.23, Dec 15 - Jan 1 $24.12, Dec 15 5:23 am $22.00, Jul 27 - Dec 17 $35.23, Dec 15 - Jan 1 $23.92, Dec 17 5:16 am $22.00, Jul 27 - Dec 17 $35.23, Dec 15 - Jan 1 $23.64, Dec 22 12:12 am $21.56, Dec 22 - Dec 24 $35.23, Dec 15 - Jan 1 $23.62, Dec 23 - Jan 20 $21.56, Dec 22 - Dec 24 $35.23, Dec 15 - Jan 1 $23.62, Dec 23 - Jan 20 $21.34, Dec 25 - Dec 27 $35.23, Dec 15 - Jan 1 $23.62, Dec 23 - Jan 20 $21.13, Dec 29 2:31 am $35.23, Dec 15 - Jan 1 $23.62, Dec 23 - Jan 20 $20.92, Dec 30 - Jan 1 $34.87, Jan 11 - Jan 23 $23.62, Dec 23 - Jan 20 $20.10, Jan 12 - Jan 14 $34.87, Jan 11 - Jan 23 $23.62, Dec 23 - Jan 20 $19.90, Jan 15 - Jan 17 $34.87, Jan 11 - Jan 23 $23.62, Dec 23 - Jan 20 $19.70, Jan 19 - Jan 20 $34.87, Jan 11 - Jan 23 $23.59, Jan 22 7:18 am $19.50, Jan 22 7:18 am $34.87, Jan 11 - Jan 23 $23.55, Jan 23 9:15 pm $19.30, Jan 23 - Jan 25 $34.52, Jan 25 - Feb 12 $23.50, Jan 25 12:59 pm $19.30, Jan 23 - Jan 25 $34.52, Jan 25 - Feb 12 $23.46, Jan 27 6:49 am $19.11, Jan 27 - Jan 28 $34.52, Jan 25 - Feb 12 $23.40, Jan 28 11:48 pm $19.11, Jan 27 - Jan 28 $34.52, Jan 25 - Feb 12 $23.37, Jan 30 6:02 pm $18.92, Jan 30 - Feb 1 $34.52, Jan 25 - Feb 12 $23.33, Feb 1 - Feb 28 $18.92, Jan 30 - Feb 1 $34.52, Jan 25 - Feb 12 $23.33, Feb 1 - Feb 28 $18.73, Feb 3 8:48 am $34.52, Jan 25 - Feb 12 $23.33, Feb 1 - Feb 28 $18.54, Feb 5 - Feb 6 $34.52, Jan 25 - Feb 12 $23.33, Feb 1 - Feb 28 $18.35, Feb 8 - Feb 10 $34.52, Jan 25 - Feb 12 $23.33, Feb 1 - Feb 28 $18.17, Feb 12 6:58 am $34.17, Feb 14 - Mar 3 $23.33, Feb 1 - Feb 28 $17.99, Feb 14 - Feb 17 $34.17, Feb 14 - Mar 3 $23.33, Feb 1 - Feb 28 $21.98, Feb 19 6:20 pm $34.17, Feb 14 - Mar 3 $23.33, Feb 1 - Feb 28 $22.00, Feb 21 - Apr 15 $34.17, Feb 14 - Mar 3 $23.32, Mar 3 1:49 am $22.00, Feb 21 - Apr 15 $33.82, Mar 4 - Mar 25 $23.33, Mar 4 - Mar 23 $22.00, Feb 21 - Apr 15 $33.82, Mar 4 - Mar 25 $23.28, Mar 25 7:10 am $22.00, Feb 21 - Apr 15 $33.48, Mar 27 - Apr 15 $23.23, Mar 27 3:14 pm $22.00, Feb 21 - Apr 15 $33.48, Mar 27 - Apr 15 $23.15, Mar 29 11:59 pm $22.00, Feb 21 - Apr 15 $33.48, Mar 27 - Apr 15 $23.09, Apr 1 10:02 am $22.00, Feb 21 - Apr 15 $33.48, Mar 27 - Apr 15 $23.01, Apr 4 2:40 am $22.00, Feb 21 - Apr 15 $33.48, Mar 27 - Apr 15 $29.42, Apr 6 5:48 pm $22.00, Feb 21 - Apr 15 $33.48, Mar 27 - Apr 15 $29.35, Apr 9 11:03 am $22.00, Feb 21 - Apr 15 $33.48, Mar 27 - Apr 15 $29.30, Apr 12 7:57 am $22.00, Feb 21 - Apr 15 $33.48, Mar 27 - Apr 15 $25.87, Apr 15 5:41 am $22.00, Feb 21 - Apr 15 $33.14, Apr 17 - Apr 23 $25.95, Apr 17 6:19 pm $25.73, Apr 17 6:19 pm $33.14, Apr 17 - Apr 23 $25.52, Apr 20 8:15 am $24.75, Apr 20 - Apr 23 $33.14, Apr 17 - Apr 23 $25.28, Apr 23 2:45 am $24.75, Apr 20 - Apr 23 $33.14, Apr 26 - May 2 $25.07, Apr 26 6:38 am $24.75, Apr 26 - May 2 $33.14, Apr 26 - May 2 $24.81, Apr 29 5:49 am $24.75, Apr 26 - May 2 $33.14, Apr 26 - May 2 $24.75, Apr 26 - May 2 $24.72, May 2 12:38 am $32.80, May 4 - May 23 $24.49, May 4 2:43 pm $24.26, May 4 2:43 pm $32.80, May 4 - May 23 $23.98, May 7 10:13 pm $23.74, May 7 10:13 pm $32.80, May 4 - May 23 $23.17, May 11 12:46 pm $22.88, May 11 12:46 pm $32.80, May 4 - May 23 $22.69, May 14 7:27 pm $22.33, May 14 7:27 pm $32.80, May 4 - May 23 $21.53, May 18 11:51 pm $21.45, May 18 11:51 pm $32.80, May 4 - May 23 $21.04, May 23 3:59 am $21.03, May 23 3:59 am $33.27, May 27 - Jun 13 $19.73, May 27 11:18 am $19.69, May 27 11:18 am $33.27, May 27 - Jun 13 $23.02, Jun 1 - Jun 5 $20.20, Jun 1 - Jul 20 $33.27, May 27 - Jun 13 $22.92, Jun 9 - Jun 17 $20.20, Jun 1 - Jul 20 $33.73, Jun 17 - Jul 3 $22.92, Jun 9 - Jun 17 $20.20, Jun 1 - Jul 20 $33.73, Jun 17 - Jul 3 $22.93, Jun 21 - Jul 13 $20.20, Jun 1 - Jul 20 $34.19, Jul 7 - Jul 27 $22.93, Jun 21 - Jul 13 $20.20, Jun 1 - Jul 20 $34.19, Jul 7 - Jul 27 $22.94, Jul 16 - Aug 3 $20.20, Jun 1 - Jul 20 $34.19, Jul 7 - Jul 27 $22.94, Jul 16 - Aug 3 $20.00, Jul 23 - Aug 22 $34.64, Jul 31 - Aug 14 $22.94, Jul 16 - Aug 3 $20.00, Jul 23 - Aug 22 $34.64, Jul 31 - Aug 14 $22.96, Aug 7 - Aug 14 $20.00, Jul 23 - Aug 22 $35.49, Aug 18 - Sep 2 $22.93, Aug 18 2:40 pm $20.00, Jul 23 - Aug 22 $35.49, Aug 18 - Sep 2 $20.00, Jul 23 - Aug 22 $19.99, Aug 22 8:47 am $35.49, Aug 18 - Sep 2 $22.92, Aug 26 - Aug 29 $22.90, Aug 26 3:22 am $35.49, Aug 18 - Sep 2 $22.92, Aug 26 - Aug 29 $22.91, Aug 29 9:46 pm $35.49, Aug 18 - Sep 2 $22.91, Sep 2 4:02 pm $22.90, Sep 2 4:02 pm $35.93, Sep 6 - Sep 26 $22.92, Sep 6 2:03 pm $22.91, Sep 6 2:03 pm $35.93, Sep 6 - Sep 26 $22.91, Sep 10 11:46 am $22.90, Sep 10 11:46 am $35.93, Sep 6 - Sep 26 $22.92, Sep 14 8:08 am $22.91, Sep 14 - Sep 30 $35.93, Sep 6 - Sep 26 $22.91, Sep 14 - Sep 30 $22.91, Sep 18 - Sep 26 $35.96, Sep 30 12:22 am $22.92, Sep 30 12:22 am $22.91, Sep 14 - Sep 30 $35.97, Oct 4 - Oct 16 $22.91, Oct 4 - Oct 8 $22.90, Oct 4 2:06 am $35.97, Oct 4 - Oct 16 $22.91, Oct 4 - Oct 8 $22.68, Oct 8 4:56 am $35.97, Oct 4 - Oct 16 $22.92, Oct 12 - Oct 20 $22.35, Oct 12 6:46 am $35.97, Oct 4 - Oct 16 $23.12, Oct 16 5:42 am $22.92, Oct 12 - Oct 20 $36.01, Oct 20 - Oct 31 $23.13, Oct 20 2:53 am $22.92, Oct 12 - Oct 20 $61.51, Oct 23 - Oct 27 $36.01, Oct 20 - Oct 31 $32.01, Oct 23 - Oct 27 $36.01, Oct 20 - Oct 31 $32.18, Oct 31 9:47 pm $31.94, Oct 31 9:47 pm OOS $36.01, Nov 4 10:18 pm $31.33, Nov 4 10:18 pm $31.12, Nov 4 10:18 pm OOS $36.05, Nov 9 12:59 am $30.69, Nov 9 12:59 am $30.47, Nov 9 12:59 am $36.05, Nov 13 - Nov 21 $30.15, Nov 13 3:41 am $29.94, Nov 13 3:41 am $36.05, Nov 13 - Nov 21 $29.90, Nov 17 10:35 am $29.68, Nov 17 10:35 am $36.05, Nov 13 - Nov 21 $29.52, Nov 21 7:29 pm $29.30, Nov 21 7:29 pm $36.88, Nov 26 - Dec 11 $29.07, Nov 26 6:21 am $28.85, Nov 26 6:21 am $36.88, Nov 26 - Dec 11 $28.71, Dec 1 2:23 am $28.49, Dec 1 2:23 am $36.88, Nov 26 - Dec 11 $28.37, Dec 5 11:18 pm $28.15, Dec 5 11:18 pm $36.88, Nov 26 - Dec 11 $27.94, Dec 11 2:00 am $27.72, Dec 11 2:00 am $37.70, Dec 16 - Jan 4 $27.34, Dec 16 2:56 am $25.75, Dec 16 2:56 am $37.70, Dec 16 - Jan 4 $27.07, Dec 21 12:59 am $22.70, Dec 21 12:59 am $37.70, Dec 16 - Jan 4 $26.78, Dec 26 2:50 pm $22.55, Dec 26 - Feb 3 $37.70, Dec 16 - Jan 4 $26.36, Dec 31 5:52 am $22.55, Dec 26 - Feb 3 $37.70, Dec 16 - Jan 4 $26.05, Jan 4 11:03 pm $22.55, Dec 26 - Feb 3 $38.51, Jan 9 - Jan 24 $25.10, Jan 9 7:50 pm $22.55, Dec 26 - Feb 3 $38.51, Jan 9 - Jan 24 $24.59, Jan 14 5:43 pm $22.55, Dec 26 - Feb 3 $38.51, Jan 9 - Jan 24 $24.26, Jan 19 5:53 pm $22.55, Dec 26 - Feb 3 $38.51, Jan 9 - Jan 24 $23.81, Jan 24 6:27 pm $22.55, Dec 26 - Feb 3 $38.12, Jan 29 - Feb 19 $23.39, Jan 29 6:56 pm $22.55, Dec 26 - Feb 3 $38.12, Jan 29 - Feb 19 $23.07, Feb 3 8:43 pm $22.55, Dec 26 - Feb 3 $38.12, Jan 29 - Feb 19 $24.98, Feb 8 11:00 pm $22.10, Feb 8 - Mar 17 $38.12, Jan 29 - Feb 19 $24.79, Feb 14 5:20 am $22.10, Feb 8 - Mar 17 $38.12, Jan 29 - Feb 19 $24.38, Feb 19 1:31 pm $22.10, Feb 8 - Mar 17 $37.74, Feb 25 - Mar 17 $24.11, Feb 25 2:29 am $22.10, Feb 8 - Mar 17 $37.74, Feb 25 - Mar 17 $23.53, Mar 5 9:28 pm $22.10, Feb 8 - Mar 17 $37.74, Feb 25 - Mar 17 $23.12, Mar 17 9:15 am $22.10, Feb 8 - Mar 17 $37.36, Mar 28 9:36 pm $23.07, Mar 28 9:36 pm $21.90, Mar 28 9:36 pm
186,693 2,536,827
2,734,375
2,050,781
1,367,188
683,594
0
Oct
Dec
Feb
Apr
Jun
Aug
Oct
Dec
Feb
Apr
2015
2016
Price Details
New
Last Seen
$37.36 Mar 28, '16
Highest
$38.51 Jan 9, '16
Lowest
$32.80 May 4, '15
Average
$37.74 (30d avg) $38.02 (90d avg) $37.26 (180d avg) $35.65 (365d avg) $35.53 (Lifetime average)
Added
Jun 16, 2014
3rd Party New
Last Seen
$23.07 Mar 28, '16
Highest
$32.01 Oct 23, '15
Lowest
$19.69 May 27, '15
Average
$23.32 (30d avg) $24.21 (90d avg) $26.01 (180d avg) $23.97 (365d avg) $24.42 (Lifetime average)
Added
Jun 16, 2014
3rd Party Used
Last Seen
$21.90 Mar 28, '16
Highest
$61.51 Oct 23, '15
Lowest
$7.65 Jul 15, '14
Average
$22.10 (30d avg) $22.31 (90d avg) $26.12 (180d avg) $24.44 (365d avg) $22.81 (Lifetime average)
Added
Jun 16, 2014
Sales Rank
30 day average: 1,431,475 90 day average: 1,734,736
Product Description
encourages students to investigate humanity's effects on the environment and the importance of natural resources and conservation. The unit builds upon prior knowledge and the overarching concept of change by providing opportunities to relate local examples of environmental pollution and conservation with hands-on scientific experiments and demonstrations. was developed by the Center for Gifted Education at The College of William and Mary to offer advanced curriculum supported by years of research. The Center's materials have received national recognition from the United States Department of Education and the National Association for Gifted Children, and they are widely used both nationally and internationally.Each of the books in this series offers curriculum that focuses on advanced content and higher level processes. The science units contain simulations of real-word problems, and students experience the work of real science by using data-handling skills, analyzing information, and evaluating results. The mathematics units provide sophisticated ideas and concepts, challenging extensions, higher order thinking skills, and opportunities for student exploration based on interest. These materials are a must for any teacher seeking to challenge and engage learners and increase achievement.
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