▁Update ▁on ▁the ▁Imp act ▁of ▁hand h eld ▁C AS ▁Systems ▁on ▁Development al ▁Al gebra ▁ ▁To : ▁Deb or ah ▁Hugh es ▁Halle tt , ▁University ▁of ▁Arizona ; ▁Eric ▁Con n ally , ▁W elles ley ▁College ; ▁Raj ini ▁Jes ud ason , ▁W elles ley ▁College ▁( Current ly : ▁Benjamin ▁Ban ne ker ▁Char ter ▁Public ▁School ); ▁Ralph ▁Te ix e ira , ▁Harvard ▁University ; ▁and ▁Gra eme ▁Bird , ▁Harvard ▁University ▁ ▁For : ▁Information , ▁Data ▁and ▁Dec isions ▁ ▁To : ▁John ▁C . ▁Miller , ▁The ▁City ▁College ▁of ▁C UN Y ▁ ▁For : ▁x y Al gebra : ▁Al gebra ▁Cour se ware ▁with ▁Int ellig ent ▁Help ▁at ▁Every ▁Step ▁▁ 1 9 9 9 ▁San ▁Francisco , ▁I CT CM - 1 2 ▁ ▁To : ▁Michael ▁E . ▁G age ▁( et ▁al .), ▁University ▁of ▁Ro chester ▁and ▁Arnold ▁K . ▁P izer , ▁University ▁of ▁Ro chester ▁ ▁For : ▁We B Work ▁ ▁To : ▁Christopher ▁We aver , ▁New ▁Mexico ▁State ▁University ▁ ▁For : ▁Mathemat ics ▁Access ible ▁to ▁Vis ually ▁Imp a ired ▁Stud ents ▁▁ 2 0 0 0 ▁Atlanta , ▁I CT CM - 1 3 ▁ ▁To : ▁Deb or ah ▁Hugh es ▁Halle tt , ▁University ▁of ▁Arizona ▁and ▁Richard ▁Thompson , ▁University ▁of ▁Arizona ▁ ▁For : ▁Computer ▁Text s ▁for ▁Business ▁Mathemat ics ▁▁ 2 0 0 1 ▁Baltimore , ▁I CT CM