In order to make addition and subtraction more engaging, there are several things you can do to help keep students attention. Have students play games such as Close to 100, Close to 0, Close to 20, and other such games. In addition to the games that are already available from many of the Math Solutions books by Marilyn Burns and other authors, I developed some card sorts to help keep students’ attention on solving problems. I have developed a variety of card sorts to teach addition and subtraction within 100. Students match a picture card of unifix or snap cubes to an equation. To make a card sort more challenging, I like to include a card which doesn’t match any other card. This helps target some misconceptions that develop around addition and subtraction. If students solve card sorts in pairs, then this creates much students’ higher thinking as they evaluate each other’s decisions about where to place cards. If you would like to try out one of the these card sorts, just click on the picture below to download a free sample of an addition card sort without regrouping. This link will take you to TPT where you can download the preview file.
According to a certain website and to the administrators at my school Bloom’s Taxonomy did change. Who knew? Actually Bloom’s understudy Lorin Anderson altered the taxonomy to be more relevant to the current times. This new version of Bloom’s taxonomy has been in place since the 90′s. Synthesis has been removed and Creating has been added as the most difficult level of Bloom’s taxonomy. Also, Anderson changed all of the taxonomy levels into verbs instead of nouns. For example, instead of the Knowledge level, Knowledge has been replaced with the verb Understanding. To view an example of the taxonomy, click here.
I so look forward to a crisp fall day after the humid triple digit temperatures we have had in the south. I am already wanting to hang my fall wreath on the door! Maybe it will hasten fall weather. With the fall weather I always think of this pumpkin unit I taught with my precious third graders in which the students all did math investigations with pumpkins. The following are pictures of the activities we did with the unit. I also made the lessons available on Teachers Pay Teachers. I added one lesson to it –pumpkin lines– to make it a full week unit. We measured pumpkin’s weight, circumference, height, and counted the seeds (eeew so messy, but fun!) Take a look below.
I just read a fabulous article from the periodical Teaching Children Mathematics (March 2011 issue) about the effectiveness of teaching subtraction with regrouping. A group of students was given a pretest beforehand and scored about 16% proficient at subtraction with regrouping from the instruction they had received the year before. The teacher showed students examples of the error patterns they were making. Next, to teach students about the errors they were making, the teacher gave students magnifying glasses and investigator hats so that they could become investigators to find a particular error pattern. Students relished the idea of finding the mistakes. As a result, the post test revealed a dramatic–more than 60% increase in proficiency of subtraction with regrouping. This article is not available for free online, however you can purchase it at http://www.nctm.org/eresources/toc.asp?journal_id=4&Issue_id=973 or your library may have a copy.