Sell, buy or rent John O. Willis textbooks

Essentials of DAS-II Assessment

by Ron Dumont, John O. Willis, Colin D. Elliott
ISBN-13: 9780470225202
ISBN-10: 0470225203
Edition: 1
Publication date: 2008
Publisher: Wiley
Format: Paperback 416 pages

Essentials of IDEA for Assessment Professionals

by Guy McBride, Ron Dumont, John O. Willis
ISBN-13: 9780470873922
ISBN-10: 0470873922
Edition: 1
Publication date: 2011
Publisher: Wiley
Format: Paperback 304 pages