I’m sure most of you are familiar with the iconic “Judy Clock”, but as I was working through some different problems involving time with my class, I noticed some HUGE misconceptions–so big that I realized Judy was only going to be able to help with part of it!
I quickly realized that although a number of my fourth graders can’t tell time (this is an increasingly big problem!), they have some other major misconceptions as well. I saw students who:
–didn’t realize the hands moved at different speeds
–didn’t understand that there are 60 minutes in one hour
–didn’t understand that there are 60 seconds in one minute
–didn’t know that there are 24 hours in one day
–didn’t know that there are 30 minutes in a half hour and 15 minutes in a quarter hour
Needless to say, Judy and I backed up quite a bit and while I had most of my class working on some problem solving, my “time team” and I got to work trying to build these foundation skills. We counted by seconds. We closed our eyes and tried to guess how long a minute is. We used Judy to “notice” things about our clock (12 numbers . . . 5 minutes between numbers . . . and so on).
We tried doing some skip counting too…like if one hour is 60 minutes, how much is 2 hours? 3 hours? 1/2 hour? Some students were still struggling, so I grabbed some paper and started cutting!
When I used “Judy”, students had a hard time keeping track of anything more than an hour so . . .
I gradually added more time and trickier problems like, “If Caren read for 60 minutes on Monday, Tuesday, and Wednesday and then only read for 19 minutes on Thursday and 35 minutes on Friday, how long did she read in all that week? They IMMEDIATELY said it was too hard and they couldn’t do it! I grabbed one of our “hour circles” and wrote 60 minutes on one side and 1 hour on the other. We lined them all up and worked with them almost like they were base 10 blocks! I reminded them that we persevere and, like most math, we could BUILD it.