From my perspective, there are four equity/access reasons science is not a priority in elementary school.
1.The science block is shared with other subjects.
At the beginning of the school year, my building usually sets aside time for each teacher to build their master schedule for the year so that students with services can be seen outside of content learning. We are recommended from those guidelines that we should spend 90 minutes in reading, 45 minutes writing, 80 minutes in mathematics, 10-25 minutes in social emotional learning (SEL), 30 minutes for intervention/small groups, and 20-60 minutes of science/social studies/health/digital citizenship/media literacy/computer science/art. Science does not have to be a priority as long as it is rotated among the other subjects. Since these are also just guidelines and recommendations, teachers could minimize their science block to 20 minutes, which is not enough time to teach science effectively. A recent National Survey of Science and Mathematics Education (2018) found that Science is not prioritized in elementary classrooms. Educators tend to cut down Science time to make time for reading and writing (Why Science Education Matters in Your Elementary School Classroom).
2. Pulling students for services during science.
Beyond our schedule, many schools strive to have accommodations and external support during school to ensure that students can meet grade-level expectations and be the best they can be in the general elementary school classroom. Such services include counseling, mental health therapy, speech therapy, additional math, reading, writing, small groups, executive function check-ins, and more. Once services are deemed necessary, they are mandated to provide the students with these services every week. Realistically, students who need services cannot all be pulled during our 30-minute interventional or small group times. This puts general elementary school teachers in a situation where they have to decide what will be the best time for these students to get the services they need. How do we decide which subject they would miss if they cannot be pulled during their singular allotted time? Typically, the answer is for students to be pulled from science.
3. Rotating science kits.
Our school district shares science kits and materials between other buildings on a rotating schedule. Sometimes we are lucky and get the kits earlier than expected, and sometimes we are not as fortunate and do not get the kits until much later. This causes a rift in content rotation scheduling. Teachers may choose to further extend the current content rotation that they are teaching or start a new content while waiting for the science kit, which sometimes completely takes precedence over teaching science when the kit finally arrives. There have been multiple accounts where teachers do not get through a full unit of science before sending the kit back.
4. Science state testing.
Science state testing is mandated through the Every Student Succeeds Act (ESSA), which states that science needs to be tested once during 3rd-5th grade, 6-9th grade, and 10-12th grade. Compared to other school subjects, Science is not prioritized, even in state testing. This again demonstrates the lack of attention, time, and resources allocated for Science learning and teaching.