I bought a new handheld calculator! Actually, it is not new; it was made about 1965. It is a Curta Type I. Curta calculators were invented by Curt Herzstark (1902 – 1988) who, according to Wikipedia: … was born in Vienna, the son of Marie and Samuel Jakob Herzstark. His father was Jewish and his mother,…
I was asked to pass the following information along to you. I decided to do so because you may want to know about one of the newest CAS calculator models and because their follow-up offer for attending the summer institute is so generous. If your school and students need help getting calculators and/or you want…
First some history and then an opinion I remember buying my first electronic calculator in the late 1960s. It did addition, subtraction, multiplication, and division, and could remember one number. It displayed 8 digits and had a special button that displayed the next eight digits. I remember using those next eight digits never. To buy…
In my final post on reviewing for the AP Calculus exams I return to calculator use. I hope everyone has been using calculators all year long. (My opinion is that students should be given a CAS calculator, or CAS computer program, or now even an iPad CAS app on the first day of Algebra 1…
Teaching Calculus 