
- Assessing Performance: Designing, Scoring, and Validating Performance Tasks
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Amazon
From $37.23 (New)

From $37.23 (New)

| Latest | $37.23 7 hrs ago |
| Highest | $49.00 Mar 6, '16 |
| Lowest | $34.62 Sep 30, '14 |
| Average | $36.87 (30d avg) $39.76 (90d avg) $39.59 (180d avg) $39.53 (365d avg) $37.76 (Lifetime average) |
| Added | Jan 19, 2014 |
| Latest | $28.19 7 hrs ago |
| Highest | $43.96 Jul 24, '15 |
| Lowest | $27.04 Jan 25, '16 |
| Average | $28.19 (30d avg) $27.78 (90d avg) $32.51 (180d avg) $34.85 (365d avg) $34.73 (Lifetime average) |
| Added | Jan 19, 2014 |
| Latest | $18.95 7 hrs ago |
| Highest | $73.62 Oct 30, '14 |
| Lowest | $17.76 Apr 10, '16 |
| Average | $17.77 (30d avg) $19.94 (90d avg) $27.19 (180d avg) $29.97 (365d avg) $34.83 (Lifetime average) |
| Added | Jan 19, 2014 |
30 day average: 794,817
90 day average: 895,662