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Buy from Amazon $73.23$0.01 $50.00 $25.00 Dec Mar Jun Sep Dec Mar Jun Sep Dec Mar Jun 2014 2015 2016 $36.43, Sep 9 12:36 pm$37.95, Oct 29 - Dec 14$37.56, Dec 16 - Dec 20$37.18, Dec 23 - Dec 28$36.99, Dec 30 - Jan 5$36.80, Jan 6 - Jan 15$36.61, Jan 15 - Jan 22$36.42, Jan 23 3:49 am$36.42, Jan 23 3:49 am$15.96, May 3 - May 17$3.09, May 4 9:20 am$36.42, Jan 23 3:49 am$15.96, May 3 - May 17$2.54, May 6 5:21 pm$36.42, Jan 23 3:49 am$15.96, May 3 - May 17$1.65, May 9 12:07 am$36.42, Jan 23 3:49 am$15.96, May 3 - May 17$0.95, May 11 8:48 am$36.42, Jan 23 3:49 am$15.96, May 3 - May 17$0.89, May 13 7:51 pm$36.42, Jan 23 3:49 am$15.96, May 3 - May 17$0.74, May 16 11:53 am$36.42, Jan 23 3:49 am$15.98, May 18 - May 22$0.64, May 18 3:05 pm$36.42, Jan 23 3:49 am$15.98, May 18 - May 22$0.57, May 21 12:44 pm$36.42, Jan 23 3:49 am$15.96, May 22 - May 25$0.50, May 23 10:24 pm$36.42, Jan 23 3:49 am$15.88, May 26 - May 27$0.44, May 26 11:22 am$36.42, Jan 23 3:49 am$14.99, May 28 - Jun 3$0.45, May 27 - Jun 4$36.42, Jan 23 3:49 am$15.52, Jun 4 5:38 pm$0.45, May 27 - Jun 4$36.42, Jan 23 3:49 am$15.40, Jun 7 - Jun 8$1.13, Jun 7 10:39 am$36.42, Jan 23 3:49 am$15.32, Jun 9 3:09 pm$1.99, Jun 9 - Jun 16$36.42, Jan 23 3:49 am$15.20, Jun 12 2:05 pm$1.99, Jun 9 - Jun 16$36.42, Jan 23 3:49 am$15.12, Jun 14 - Jun 15$1.99, Jun 9 - Jun 16$36.42, Jan 23 3:49 am$15.00, Jun 17 7:53 am$2.00, Jun 17 - Jun 23$36.42, Jan 23 3:49 am$15.96, Jun 18 - Jun 19$2.00, Jun 17 - Jun 23$36.42, Jan 23 3:49 am$15.00, Jun 21 - Jun 23$2.00, Jun 17 - Jun 23$36.42, Jan 23 3:49 am$14.99, Jun 24 - Jun 27$1.95, Jun 24 9:07 pm$36.42, Jan 23 3:49 am$14.99, Jun 24 - Jun 27$1.82, Jun 27 7:35 am$36.42, Jan 23 3:49 am$14.87, Jun 29 - Jun 30$1.64, Jun 29 3:11 pm$36.42, Jan 23 3:49 am$14.85, Jul 1 10:48 am$1.53, Jul 1 10:48 am$36.42, Jan 23 3:49 am$15.00, Jul 2 - Jul 18$1.22, Jul 3 7:58 pm$36.42, Jan 23 3:49 am$15.00, Jul 2 - Jul 18$1.13, Jul 6 3:28 am$36.42, Jan 23 3:49 am$15.00, Jul 2 - Jul 18$1.04, Jul 8 9:07 pm$36.42, Jan 23 3:49 am$15.00, Jul 2 - Jul 18$0.96, Jul 11 - Jul 12$36.42, Jan 23 3:49 am$15.00, Jul 2 - Jul 18$0.81, Jul 14 2:40 am$36.42, Jan 23 3:49 am$15.00, Jul 2 - Jul 18$0.51, Jul 16 5:34 pm$36.42, Jan 23 3:49 am$13.88, Jul 19 - Aug 1$0.01, Jul 19 - Aug 11$36.42, Jan 23 3:49 am$13.50, Aug 2 - Aug 7$0.01, Jul 19 - Aug 11$36.42, Jan 23 3:49 am$13.88, Aug 8 - Aug 19$0.01, Jul 19 - Aug 11$36.42, Jan 23 3:49 am$13.88, Aug 8 - Aug 19$0.26, Aug 12 9:01 am$36.42, Jan 23 3:49 am$13.88, Aug 8 - Aug 19$0.42, Aug 13 - Aug 15$36.42, Jan 23 3:49 am$13.88, Aug 8 - Aug 19$0.01, Aug 17 - Aug 18$36.42, Jan 23 3:49 am$13.88, Aug 8 - Aug 19$0.42, Aug 19 - Aug 20$36.42, Jan 23 3:49 am$15.00, Aug 20 - Sep 12$0.42, Aug 22 - Aug 28$36.42, Jan 23 3:49 am$15.00, Aug 20 - Sep 12$0.50, Aug 29 6:14 am$36.42, Jan 23 3:49 am$15.00, Aug 20 - Sep 12$4.48, Aug 31 - Sep 1$37.95, Sep 2 10:32 pm$15.00, Aug 20 - Sep 12$8.33, Sep 2 - Sep 7$15.00, Aug 20 - Sep 12$8.33, Sep 2 - Sep 7$15.00, Aug 20 - Sep 12$8.29, Sep 8 9:15 pm$15.00, Aug 20 - Sep 12$7.15, Sep 11 9:11 am$25.99, Sep 13 - Sep 14$8.14, Sep 13 - Sep 14$44.21, Sep 15 - Sep 21$8.33, Sep 15 7:49 pm$44.21, Sep 15 - Sep 21$8.28, Sep 17 9:30 pm$44.21, Sep 15 - Sep 21$7.97, Sep 20 2:33 am$44.20, Sep 23 - Sep 28$4.49, Sep 23 2:13 pm$44.20, Sep 23 - Sep 28$4.15, Sep 25 3:18 pm$44.20, Sep 23 - Sep 28$3.83, Sep 27 7:33 pm$35.00, Sep 30 - Oct 6$3.47, Sep 30 10:47 pm$35.00, Sep 30 - Oct 6$3.31, Oct 3 2:09 am$35.00, Sep 30 - Oct 6$3.24, Oct 4 4:17 am$34.98, Oct 8 - Oct 13$2.77, Oct 8 7:48 am$34.98, Oct 8 - Oct 13$2.58, Oct 10 11:09 am$34.98, Oct 8 - Oct 13$2.37, Oct 12 12:53 pm$34.90, Oct 15 7:16 pm$2.17, Oct 15 7:16 pm$34.87, Oct 17 3:08 am$2.13, Oct 17 3:08 am$34.78, Oct 19 - Oct 21$2.02, Oct 19 - Oct 21$34.77, Oct 22 - Oct 25$3.42, Oct 22 5:47 pm$34.77, Oct 22 - Oct 25$4.94, Oct 23 10:50 pm$34.77, Oct 22 - Oct 25$5.33, Oct 25 9:48 pm$34.45, Oct 28 2:23 pm$5.45, Oct 28 2:23 pm$34.28, Nov 2 10:11 pm$5.22, Nov 2 10:11 pm$34.22, Nov 6 7:21 pm$5.63, Nov 6 7:21 pm$34.10, Nov 12 9:08 am$6.37, Nov 12 9:08 am$34.05, Nov 16 5:28 pm$6.25, Nov 16 5:28 pm$19.97, Nov 21 5:34 pm$6.02, Nov 21 5:34 pm$19.95, Nov 23 - Nov 27$5.84, Nov 23 5:26 pm$19.95, Nov 23 - Nov 27$5.65, Nov 25 8:40 pm$19.95, Nov 23 - Nov 27$5.49, Nov 27 5:44 pm$19.94, Nov 29 4:01 pm$5.30, Nov 29 4:01 pm$19.91, Dec 3 1:17 pm$4.64, Dec 3 1:17 pm$30.00, Dec 5 - Dec 7$4.27, Dec 5 2:24 pm$30.00, Dec 5 - Dec 7$3.85, Dec 7 12:56 pm$29.50, Dec 9 2:17 pm$3.58, Dec 9 2:17 pm$29.25, Dec 11 - Dec 14$3.14, Dec 13 3:06 pm$29.25, Dec 11 - Dec 14$3.02, Dec 14 2:55 pm$24.99, Dec 18 - Dec 30$2.59, Dec 18 1:22 pm$24.99, Dec 18 - Dec 30$2.31, Dec 22 - Dec 23$24.99, Dec 18 - Dec 30$2.22, Dec 25 7:35 am$24.99, Dec 18 - Dec 30$2.13, Dec 27 6:39 pm$24.99, Dec 18 - Dec 30$1.97, Dec 30 10:10 pm$24.00, Jan 1 - Jan 6$1.89, Jan 1 12:15 pm$24.00, Jan 1 - Jan 6$1.80, Jan 4 - Jan 5$24.00, Jan 1 - Jan 6$1.71, Jan 6 10:14 pm$67.66, Jan 9 6:33 pm$8.33, Jan 9 - Jan 10$63.36, Jan 11 3:28 pm$8.08, Jan 11 3:28 pm$59.29, Jan 14 3:44 pm$9.00, Jan 13 - Jan 17$65.33, Jan 16 9:32 am$9.00, Jan 13 - Jan 17$60.74, Jan 19 12:21 am$9.00, Jan 19 12:21 am$55.46, Jan 21 11:05 am$19.95, Jan 19 - Jan 21$56.27, Jan 23 11:10 pm$19.69, Jan 23 11:10 pm$55.93, Jan 25 2:50 pm$19.43, Jan 25 2:50 pm$57.84, Jan 28 5:49 am$19.07, Jan 28 5:49 am$58.95, Jan 31 6:18 pm$5.00, Jan 31 - Feb 5$56.52, Feb 2 12:58 pm$5.00, Jan 31 - Feb 5$38.15, Feb 5 5:42 am$5.00, Jan 31 - Feb 5$42.16, Feb 7 - Feb 15$4.11, Feb 7 12:47 am$42.16, Feb 7 - Feb 15$4.01, Feb 10 3:06 pm$42.16, Feb 7 - Feb 15$0.50, Feb 12 10:25 am$42.16, Feb 7 - Feb 15$0.49, Feb 13 - Feb 15$63.85, Feb 18 2:54 am$4.51, Feb 18 2:54 am$59.13, Feb 20 1:27 am$3.59, Feb 19 - Feb 20$45.65, Feb 22 11:14 pm$4.00, Feb 21 - Feb 23$47.19, Feb 24 10:56 pm$3.99, Feb 24 - Feb 26$42.33, Feb 27 8:53 pm$3.92, Feb 27 8:53 pm$50.84, Mar 1 10:16 pm$3.15, Mar 1 10:16 pm$51.89, Mar 4 3:30 am$3.51, Mar 4 3:30 am$54.50, Mar 6 6:36 am$4.08, Mar 6 6:36 am$50.62, Mar 9 6:36 am$4.09, Mar 8 - Mar 9$38.42, Mar 11 2:07 pm$4.17, Mar 10 - Mar 12$64.87, Mar 13 10:53 pm$5.20, Mar 13 - Mar 18$66.03, Mar 17 12:50 am$5.20, Mar 13 - Mar 18$57.48, Mar 19 10:43 am$6.03, Mar 19 10:43 am$44.04, Mar 21 3:42 pm$6.28, Mar 21 3:42 pm$43.19, Mar 23 10:51 pm$7.30, Mar 23 - Mar 25$39.24, Mar 26 6:19 am$0.16, Mar 26 6:19 am$38.12, Mar 28 1:32 pm$0.28, Mar 28 1:32 pm$46.30, Mar 29 5:21 pm$0.23, Mar 29 5:21 pm$36.59, Apr 1 3:16 am$0.24, Apr 1 3:16 am$50.47, Apr 3 7:39 pm$0.28, Apr 3 - Apr 6$44.57, Apr 7 6:56 pm$0.23, Apr 7 6:56 pm$38.47, Apr 10 11:26 am$0.07, Apr 10 11:26 am$39.08, Apr 11 11:12 pm$0.24, Apr 11 11:12 pm$38.10, Apr 14 2:25 pm$0.40, Apr 14 - Apr 17$39.29, Apr 17 5:51 am$0.40, Apr 14 - Apr 17$41.14, Apr 18 12:44 pm$0.37, Apr 18 12:44 pm$38.70, Apr 21 5:37 am$0.28, Apr 21 5:37 am$38.67, Apr 24 12:48 am$0.40, Apr 24 12:48 am$39.87, Apr 27 4:12 am$0.40, Apr 27 4:12 am$28.89, Apr 30 1:18 am$0.23, Apr 30 1:18 am$23.42, May 1 11:13 am$0.28, May 1 - May 4$28.62, May 4 4:56 am$0.28, May 1 - May 4$23.15, May 5 2:23 pm$0.35, May 5 2:23 pm$24.95, May 9 2:58 pm$0.11, May 9 2:58 pm$25.31, May 14 11:21 am$0.40, May 12 - May 14$23.79, May 18 - May 22$0.34, May 18 1:35 pm$23.79, May 18 - May 22$0.22, May 22 6:44 pm$23.77, May 27 1:47 am$0.08, May 27 1:47 am$23.79, May 31 3:34 pm$0.01, May 31 - Jun 17$24.54, Jun 3 - Jun 5$0.01, May 31 - Jun 17$40.80, Jun 7 - Jun 9$0.01, May 31 - Jun 17$40.71, Jun 11 11:47 pm$0.01, May 31 - Jun 17$40.10, Jun 15 9:21 pm$0.01, May 31 - Jun 17$42.28, Jun 17 6:57 pm$0.01, May 31 - Jun 17$42.11, Jun 21 1:41 pm$0.40, Jun 21 1:41 pm$41.26, Jun 25 8:48 am$0.09, Jun 25 8:48 am$40.34, Jun 29 11:10 am$0.01, Jun 29 - Jul 27$39.62, Jul 3 3:53 pm$0.01, Jun 29 - Jul 27$38.15, Jul 7 10:33 pm$0.01, Jun 29 - Jul 27$37.49, Jul 13 4:58 am$0.01, Jun 29 - Jul 27$46.90, Jul 16 9:05 pm$0.01, Jun 29 - Jul 27$40.38, Jul 22 9:24 am$0.01, Jun 29 - Jul 27$40.02, Jul 24 4:51 am$0.01, Jun 29 - Jul 27$57.30, Jul 27 6:01 pm$0.01, Jun 29 - Jul 27$53.36, Jul 29 1:31 pm$0.73, Jul 29 - Aug 2$47.72, Aug 3 11:02 pm$0.72, Aug 3 11:02 pm$24.99, Aug 7 - Aug 11$0.69, Aug 7 2:04 pm$24.99, Aug 7 - Aug 11$0.40, Aug 11 10:23 am$25.00, Aug 15 - Aug 20$0.41, Aug 15 4:45 am$25.00, Aug 15 - Aug 20$0.40, Aug 17 2:40 am$25.00, Aug 15 - Aug 20$0.96, Aug 20 - Aug 24$24.99, Aug 24 1:46 pm$0.96, Aug 20 - Aug 24$30.00, Aug 28 - Aug 30$0.99, Aug 28 8:44 am$30.00, Aug 28 - Aug 30$5.96, Aug 30 6:26 am$25.00, Sep 1 3:25 am$9.75, Sep 1 3:25 am$65.04, Sep 5 1:01 am$11.70, Sep 5 1:01 am$59.62, Sep 7 12:47 am$11.72, Sep 7 12:47 am$63.40, Sep 9 12:39 am$11.56, Sep 9 12:39 am$61.62, Sep 11 12:04 am$11.70, Sep 11 12:04 am$58.00, Sep 12 11:29 pm$10.92, Sep 12 11:29 pm$53.90, Sep 16 8:28 pm$10.26, Sep 16 8:28 pm$63.79, Sep 20 4:59 pm$10.22, Sep 20 4:59 pm$60.76, Sep 24 3:24 pm$6.99, Sep 24 3:24 pm$56.78, Sep 28 12:27 pm$4.69, Sep 28 - Sep 30$55.68, Sep 30 1:02 pm$4.69, Sep 28 - Sep 30$50.96, Oct 4 2:32 pm$1.37, Oct 4 2:32 pm$47.70, Oct 8 5:49 pm$0.77, Oct 8 5:49 pm$47.05, Oct 10 8:27 pm$0.53, Oct 10 8:27 pm$44.33, Oct 14 7:25 pm$0.57, Oct 14 7:25 pm$41.52, Oct 18 3:15 pm$0.32, Oct 18 3:15 pm$38.52, Oct 22 12:51 pm$0.22, Oct 22 - Oct 30$37.19, Oct 26 9:44 am$0.22, Oct 22 - Oct 30$36.12, Oct 30 8:44 am$0.22, Oct 22 - Oct 30$35.30, Nov 3 8:22 am$0.31, Nov 3 8:22 am$34.71, Nov 7 11:25 am$0.40, Nov 7 - Nov 24$34.29, Nov 11 2:03 pm$0.40, Nov 7 - Nov 24$33.66, Nov 15 6:08 pm$0.40, Nov 7 - Nov 24$33.02, Nov 20 3:18 am$0.40, Nov 7 - Nov 24$32.42, Nov 24 1:32 pm$0.40, Nov 7 - Nov 24$32.16, Nov 29 5:33 am$0.26, Nov 29 5:33 am$31.74, Dec 4 3:03 am$0.40, Dec 4 - Dec 6$31.45, Dec 6 2:28 pm$0.40, Dec 4 - Dec 6$30.85, Dec 11 5:52 pm$0.01, Dec 11 - Dec 16$30.28, Dec 16 7:03 pm$0.01, Dec 11 - Dec 16$29.81, Dec 21 4:27 pm$0.40, Dec 21 4:27 pm$29.26, Dec 27 4:33 am$0.35, Dec 27 4:33 am$39.99, Dec 29 6:14 pm$0.40, Dec 29 - Jan 3$57.62, Jan 3 1:29 pm$0.40, Dec 29 - Jan 3$56.51, Jan 6 12:01 am$1.50, Jan 6 12:01 am$58.59, Jan 10 9:04 pm$2.99, Jan 10 9:04 pm$58.37, Jan 13 8:47 am$5.94, Jan 13 8:47 am$64.83, Jan 15 - Jan 20$8.57, Jan 15 9:11 pm$64.83, Jan 15 - Jan 20$6.90, Jan 20 9:19 pm$64.21, Jan 23 10:33 am$6.61, Jan 23 10:33 am$63.19, Jan 28 12:48 pm$6.22, Jan 28 12:48 pm$62.64, Feb 2 12:04 pm$5.51, Feb 2 12:04 pm$62.45, Feb 5 2:33 am$5.13, Feb 5 2:33 am$61.11, Feb 10 4:00 am$4.45, Feb 10 4:00 am$54.99, Feb 15 12:29 pm$1.77, Feb 15 12:29 pm$54.21, Feb 18 6:04 am$1.56, Feb 18 6:04 am$52.31, Feb 23 8:13 pm$0.53, Feb 23 8:13 pm$50.43, Feb 29 4:00 am$0.23, Feb 29 4:00 am$44.63, Mar 13 7:23 am$0.01, Mar 13 - Mar 30$48.04, Mar 19 1:30 am$0.01, Mar 13 - Mar 30$32.04, Mar 30 12:22 pm$0.01, Mar 13 - Mar 30 32,321717,898 781,250 625,000 468,750 312,500 156,250 Oct Dec Feb Apr Jun Aug Oct Dec Feb Apr 2015 2016

Price Details

New

Last Seen $37.95 Sep 2, '14
Highest $37.95 Sep 2, '14
Lowest $36.42 Jan 23, '14
Average $36.69 (Overall average)
Added Sep 9, 2013

3rd Party New

Latest $32.04 Mar 30, '16
Highest $73.23 Sep 3, '15
Lowest $13.49 May 12, '15
Average $46.90 (30d avg)
$55.75 (90d avg)
$45.67 (180d avg)
$42.32 (365d avg)
$36.51 (Lifetime average)
Added Sep 9, 2013

3rd Party Used

Latest $0.01 Mar 30, '16
Highest $19.95 Jan 19, '15
Lowest $0.01 Mar 13, '16
Average $0.01 (30d avg)
$2.67 (90d avg)
$1.54 (180d avg)
$1.75 (365d avg)
$2.72 (Lifetime average)
Added Sep 9, 2013

Sales Rank

30 day average: 287,209
90 day average: 264,656

Product Description

With clear and concrete examples from elementary and high schools, this book helps you effectively gather, analyze, and use data to improve student learning. It demonstrates how to make better decisions, identify root causes of problems, and communicate and report results.

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