My students need 4 electronic scales to accurately measure the tiny changes that occur in dialysis bags and potato cores due to osmosis.
FULLY FUNDED! Mrs. Garcia's classroom raised $878
This project is fully funded
Celebrating Hispanic & Latinx Heritage Month
This project is a part of the Hispanic & Latinx Heritage Month celebration because
it supports a Latino teacher or a school where the majority of students are Latino.
My Students
40 students and only one electronic balance! Your generous donation can provide my students with one of the tools they need to complete the 12 AP Biology labs from the Advanced Placement curriculum.
The students in my school are predominately socioeconomically disadvantaged.
86% of the students in my school qualify for the federal governments' free or reduced lunch program. The poor economy has hit them very hard and many of their parents are currently unemployed. Many of the students are the first in their families to graduate from high school and most are the first to continue on to college. While the students and their families struggle to make it through each day, the students work hard to better themselves and in last years graduating class, more than 40% had completed the A-G requirements to attend a 4 year university. This percentage has increased steadily over the past 6 years as we have expanded our AVID program and focused on creating a "college going culture" at our school. We truly believe that a college education is the key to a brighter future for our students. Providing access to AP courses is one means to encourage them to go on to achieve their dreams.
My Project
The first lab we will use these balances with is an Osmosis/Diffusion Lab. The students mass out dialysis tubing filled with 15 ml of solutions that have different molarities. They place the tubes in water for 30 minutes and then mass them again to get the % change over the time period. After they graph the % change they can clearly see that as the molarity of the solution inside the bag increases, the mass of the bag increases. This is due to the movement of water into the bag by osmosis. This is a difficult concept to teach and it is most clearly demonstrated through a hands on experience. The students also mass out potato cores and place them in solutions of differing molarities. After an overnight stay in the solutions, the students mass out the potato cores on the second day. This part of the lab demonstrates how osmosis works in living cells. We will use the balances through the year for many lab experiences which will help prepare my students for the rigor of college.
These balances will be used several times each year by AP Biology students who will be moving on to college in a year or two.
Understanding how to use these valuable tools will benefit my students as the balances will allow them to get very accurate measurements for the AP Biology labs we will complete throughout the year. In these labs, the students must measure extremely small changes in mass due to biological processes such as osmosis and transpiration.
Nearly all students from low‑income households
Data about students' economic need comes from the National Center for Education Statistics, via our partners at MDR Education. Learn more
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As a teacher-founded nonprofit, we're trusted by thousands of teachers and supporters across the country. This classroom request for funding was created by Mrs. Garcia and reviewed by the DonorsChoose team.
